The Gaussian free space optical MIMO channel with Q-ary pulse position modulation

被引：65
作者：
Letzepis, Nick [1 ]
Holland, Ian [1 ]
Cowley, William [1 ]
机构：
[1] Univ S Australia, Inst Telecommun Res, Adelaide, SA 5001, Australia
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2008年 / 7卷 / 05期
关键词：
optical communication; random media; MIMO systems; pulse position modulation; Gaussian channels; information theory;
D O I：
10.1109/TWC.2008.061002
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The main drawback in communicating via the free space optical (FSO) channel is the detrimental effect the atmosphere has on a propagating laser beam. Atmospheric turbulence causes random fluctuations in the irradiance of the received optical laser beam, commonly referred to as scintillation. This paper investigates the use of multiple lasers and multiple apertures to mitigate the effects of scintillation. In particular, the FSO multiple-input multiple-output (MIMO) channel with Q-ary pulse position modulation (QPPM) and transmit repetition under the assumption of non-ideal photodetection is analyzed in terms of its uncoded bit error rate (BER) and ergodic channel capacity. This analysis is based, in part, on the use of irradiance fluctuation samples that were obtained from a laser range experiment that was conducted in the presence of moderate turbulence conditions. Expressions are derived for the log-likelihood ratio (LLR) of a received bit, uncoded BER and ergodic capacity. Using these results it is shown that large gains are possible with the use of MIMO combined with strong coding techniques.
引用
收藏
页码：1744 / 1753
页数：10
相关论文
共 38 条
[21]   Capacity bounds for power- and band-limited optical intensity channels corrupted by Gaussian noise [J].
Hranilovic, S ;
Kschischang, FR .
IEEE TRANSACTIONS ON INFORMATION THEORY, 2004, 50 (05) :784-795
[22]   Wireless infrared communications [J].
Kahn, JM ;
Barry, JR .
PROCEEDINGS OF THE IEEE, 1997, 85 (02) :265-298
[23]   Performance of APD-based, PPM free-space optical communication systems in atmospheric turbulence [J].
Kiasaleh, K .
IEEE TRANSACTIONS ON COMMUNICATIONS, 2005, 53 (09) :1455-1461
[24]  
Li J., 2003, Particuology, V1, P168, DOI [10.1016/S1672-2515(07)60135-3, DOI 10.1016/S1672-2515(07)60135-3]
[25]   PRACTICAL CODES FOR PHOTON COMMUNICATION [J].
MCELIECE, RJ .
IEEE TRANSACTIONS ON INFORMATION THEORY, 1981, 27 (04) :393-398
[26]  
MITCHELL RL, 1968, J OPT SOC AM
[27]  
Papoulis A., 1991, PROBABILITY RANDOM V
[28]  
Proakis J. G., 2008, Digital communications, V5th
[29]  
Saleh B., 1978, SPRINGER SERIES OPTI
[30]  
STROHBEHN JW, 1978, LASER BEAM PROPAGATI, V25
1234